Directory:Wireless Transmission of Electricity

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PowerPedia:Wireless transmission of electricity, also known as wireless energy transmission, is the process that takes place in any system where electromagnetic energy is transmitted from a power source (such as a Tesla coil) to an electrical load, without interconnecting wires. Wireless transmission is employed in cases where interconnecting wires are inconvenient, hazardous, or impossible. Though the physics can be similar (pending on the type of wave used), there is a distinction from electromagnetic transmission for the purpose of transferring information (radio), where the amount of power transmitted is only important when it affects the integrity of the signal.

: "Two coils with a matched resonance at the exact matching frequency on both ends = wireless power."

History

Wireless technology goes back to Tesla's experiments in Colorado in the early 1900s.

When Tesla died, the government took all of his papers and classified them. They did return most of those papers to Tesla's country of birth, but it would appear that the U.S. Government withheld some of those papers to hide certain technology from the public.

Wireless transmission of electricity, Tesla style, would have circumvented the metering of energy, abundantly available. That is why J.P. Morgan took the financing away from Tesla when he was building the Wardenclyffe tower on Long Island to supply wireless power to the world.

Videos

Collecting all those microwaves, radio waves, tv waves, electromagnetic radiation and brain waves from the atmosphere. (YouTube October 21, 2007)

Companies

Free Energy Blog:2014:03:16 - "We're not actually putting electricity in the air. What we're doing is putting a magnetic field in the air." It works like this: WiTricity build a "Source Resonator". (Free Energy Blog March 16, 2014)

Wireless Power Energizes Many Devices - "Wired" at CES 2009, video interview - Utilizing principles of magnetic induction, Powermat pairs an ultra-thin mat with a receiver that connects to your device. The two parts of the Powermat system - mats and receivers - all work together. (Wired Jan. 9, 2009)

MIT WiTricity

http://www.witricitynet.com - independent coverage

Eric Giler demonstrates wireless electricity at TEDGlobal 2009 - Eric Giler gives a ten-minute demonstration at this year's TEDGlobal show, demonstrating how wireless power seems very close to breaking through into the mainstream market. He wirelessly powers a TV from a distance of 6.5ft, and then proceeds to charge Nokia, Apple and T-Mobile cell phones. (GizMag August 30, 2009)

MIT's Wireless Power - In the spirit of PowerPedia:Nikola Tesla's dream of wireless power, MIT physicist Marin Soljacic is working on a way to transmit power wirelessly, both efficiently and safely. Now his work has made MIT Technology Review's TR10 list for 2008. (MIT Technology Review March/April 2008)

Electricity in the Air - If cord-free power delivers on its promise, our "wireless" world will finally live up to the name. Ramifications of MIT's work on WiTricity, bringing Tesla's dream to fruition. (Popular Science Jan. 23)

MIT Wirelessly Powers a Lightbulb - A team from MIT has experimentally demonstrated lighting a 60W light bulb from a power source seven feet (more than two meters) away there was no physical connection between the source and the appliance. The MIT team refers to its concept as “WiTricity" (as in wireless electricity). (PhysOrg June 7, 2007) (See Slashdot discussion)

Nevada Lightning Lab

Pushing 800W of Wireless Power at 5 Meters - Nevada Lightning Lab has proposed a research facility for generating controlled lightning discharges using a matched set of 12-story Tesla Coil towers, with discharges over 300 feet in length, delivering a peak output of over 18 million volts. Located 35 miles outside Las Vegas, Nevada, this facility will support new industrial and scientific research. The 1:12 scale model twin tower prototypes are completed in San Francisco, CA. (Slashdot Dec. 10, 2008)

Recharging Gadgets Wirelessly - A Delaware-based startup called WildCharge is selling a small metal pad, about the size of a sheet of paper, that can simultaneously charge multiple devices laid on top of it--as long as they're equipped with adaptors. (MIT Technology Review Dec. 13, 2007)

Plastic sheet delivers wireless power - Japanese researchers have developed a flexible plastic sheet that can wirelessly transmit power to electronic devices. Desks and walls could one day light up electronics without need for cables. (Nature Apr. 29, 2007)

Plastic Sheet of Power - Printing flexible electronics on plastic provides a way to wirelessly power gadgets. Researchers at the University of Tokyo have demonstrated a prototype that consists of plastic and flexible electronics, and can wirelessly supply power to any device that touches its surface. (MIT Technology Review Dec. 14, 2006)

Charging Batteries without Wires - New MIT research reveals a way to send wireless energy to mobile phones and laptops using the principle of resonance. (MIT Technology Review Nov. 15, 2006) (See also BBC)

Stray Magnetic Energy Harvesting in Power Lines through Inductive Coupling for Wireless Sensor Nodes - The concept of transferring power from one end to another end is not new as Tesla in the olden days has proven the wireless power transfer concept. Through inductive coupling, the magnetic energy is emitted from the transmitting coil to the receiving coil. Te application of wireless power transfer to sustain or rather to enlongate the lifetime of the wireless sensor node in a network fashion is interesting and feasible. The research work has experimentally proven that by harvesting the stray magnetic energy surrounding the power lines through inductive coupling, the operation of the wireless sensor node is sustained.

Wireless Transmission: A Century of Power Politics Tussles Over - Hidden political interests repeatedly block attempts to bring this energy-saving and cost-saving technology into being. How long will the drama continue before North Americans are able obtain access to that which Russians scientists have already achieved? (PESN Aug. 3, 2006)